Manual for Embryo Transfer in Cattle
, by George E. Seidel, Jr. and Sarah Moore Seidel, of the Animal Reproduction Laboratory, Colorado State University, Fort Collins. Published by the Food and Agriculture Organization of the United Nations. View at
http://www.fao.org/docrep/004/t0117e/t0117e00.htm

American Embryo Transfer Association
rules for documenting the collection of embryos, and protocols for the identification and sale of embryos: view their website at
http://www.aeta.org/